Engine.



A. J. MARX.

ENGINE.

5 SHEETS-SHEET 2.

A. J. MARX. ENGINE.

APPLICATION FILED JUNE 30, i916.4 LQLQQT..

5 SHEETS-SHEET a. 4x-

Wmme@ Patented July s, 191?.

A. J. MARX. ENGINE.

A'PPLICATION FILED JUNE 30, |916. 3,

5 SHEETS-SHEET 4- A. J. MARX.

ENGINE.

Patented July 3, 1917.

` S EE -S EET 5.

orario.

ARTHUR JOHN MARX, 0F LE SUEUR, MINNESOTA.

ENG-mE.

Specification of Letters Patent.

Patented July 3, 191 "7..

Application led .T une 30, 1916. Serial No. 106,683.

hereby declare the following to be a full,-

clear, and exact description of the invention such as will enable Othersskilled in the art to which it appertains to make and use the same.' j

This invention relates to rotary explosive en 'nes.

he object of the invention is to provide a rotary explosive engineembodying an improved general construction, an improved system ofoiling, an improved ignition system, and an improved system forsupplying fuel to the cylinders. f

A further object of the linvention is to provide a rotary -explosiveengine of the four stroke cycle type which can be easily assembled, inwhich the parts are readily accessible and which will be eliicient inoperation.

With the above and other objects in view the invention consists in thedetails of construction and in the arrangement and combination of partsto be hereinafter more fully described and particularly pointed out inthe appended claims In describing the invention in detail reference willbe had to the accompanying drawings wherein like characters of referencedenote corresponding parts in the several views, and in which y Figure 1is a side elevation of a rotary explosive engine constructed inaccordance with the invention,

Fig. 2, a vertical section of same,

Fig. 3, a section on-the line 3 3 of Fig. 2

Fig. 4, a section on the line 4-4 of Fig. 3,

Fig. 5, a section on the line 5-5 of Fig. 3,

Fig. 6, a view in elevation of the exhaust cam Fig. 7, an enlargedsection of a fragment of one of the cylinders and its piston,

Fig. 8, a section on the line 8 8 of Fig. 9,

Fig. 9, a planV view of a fragment of the engine showing the timingmechanism in section,

Fig. 10, an enlarged section of a fragment of one of the cylindersshowing the exhaust valve and outlet connections; and

Fig. 11, a diagrammatic view of the wiring of the ignition system.

Referring to the drawings the invention is shown as comprising a frame Awhich carries alined bearings 10 and 11. Rotatably mounted in thesebearings are the trunnions 12 and 13 of the case 14 of the engine. Thiscase 14 is substantially cylindrical in shape and may be formed ofseparate pieces for convenience in assembling. The case 14 is providedwith a partition 15 having an opening 16 around whlch are provided innerand outer flanges 17 and 18. The flange 18 is rovided with gear teeth 19for a purpose t at will presently appear. The inner end of the trunnion13 is provided with a recess 20 in-which is engaged one end 21 of afixed crank shaft B. The other end of the shaft B is indicated at 22 andextends through a passage 23 in the `trunnion 12. The central portion ofthe shaft B is U- shaped and includes an arm connecting portion 24.Mounted on the case 14 is a plurality of cylinders C in each of which isslidable a piston D. Pivotally connected to each piston D is aconnecting rod E. The inner end of each connecting rod E terminates inan enlarged portion 25 and-these enlarged portions are provided withlateral extensions 26 which are engaged under the enlarged portions ofadjacent connecting rods and in this way the enlarged portions 25 aresupported out of contactwith the arm connecting portion 24 to form anoil space. Each connecting rod E is provided with a longitudinal passage27, the inner end of which communicates with the space between theenlarged portions 25 and the arm connecting'p'ortion 24 of the shaft B.The outer end of each passage 27 communicates with a transverse passage28 in the related connecting rod E and extending through this passage 28is an arcuate pi e 29 the ends of which are engaged throng the relatedpiston D so as to deliver oil to the wall of the related cylinder C.Each pipe 29 is provided with a slot 30 at its central portion whichconnects the bore thereof with the related passage 27 so that oilpassing outwardly in the passage 27 will be delivered into the bore ofthe related pipe 29 and then delivered against the wall of the relatedcylinder as will be obvious. The fixed crank shaft B is provided withoil passages 31 and 32, the former delivering oil between the end 22 ofthe shaft B and the trunnion 12 of the engine case and also between theend 21 of the shaft B and the flanges 17 and 18 and the wall of therecess 20, it being noted that l branch assages 33 and 34 are providedin the sha -t B for conveying oil to the parts just enumerated. Thepassage 32 conveys oil to the space between the arm connecting portions24 and 25 and the inner end of the connecting rod E from when it passesthrough the passages 27 for lubricating the cylinders C in the mannerpreviously mentioned.

Each cylinder C is provided with an exhaust port 35 which is controlledby a valve 36 normally held closed by a, spring 37. One end of a pipe 38communicates with the port 35 and these pipes 38 support at their outerend a band 39 which acts as a closure for an exhaust trough 40 mountedon the frame A, it being understood that the outer ends of the pipes 38open through the band 39. Mounted on the outer end of each cylinder C isa bracket 4l and pivoted on this bracket is a rocker arm 42 one end ofwhich is pivotally connected to the valve 36. The other end of therocker arm 42 has pivotally connected thereto one end of a link 43 andthis link is in turn pivotally y connected to one end of a rocker arm 44mounted in the case 14. Slidably mounted on the partition 15 is a tappetrod 45 the outer end of which is pivotally connected to the rocker arm44 while the inner end terminates in a cross arm 46 and one end of thelatter projects through an opening 47 in the partition 15 into the spacebetween said partition and the adjacent end of the case 14. Keyed on theend 31 of the shaft B is a collar 48 provided with an arm 49 whichcarries a stub shaft 50. Rotatable on this stub shaft 50 is a gear 51which meshes with the gear teeth 19 so that rotation of the case 14 willeffect rotation of the gear 51. Mounted on the inner face of the gear 51is a cam F formed of three arms 52, the ends of which are provided withcam faces 53 adapted for coperation with the cross arms 46 on the tappetrod 45. Formed on the crank shaft B is a holding flange 54 which is alsoadapted to .coperate with the cross arms 46 in a manner that willhereinafter appear. The arm 49 is provided with a passage 55 whichcommunicates with a passage 56 in the stub shaft 5() and this passage 56serves to deliver oil between said shaft and the gear 51 and cam F.Mounted in the outer end of the passage 55 is a scoop 57 which, durinrotation of the case 14 causes the oil wit inthe case to move into thepassage 55 from where it will work its way to the desired points. Itwill be noted that the case 14 is provided with a groove 58 in which thescoop 57 travels and as oil will always accumulate in this groove aneffective lubrication is had. During the operation of the engine, as theexhaust pipe 38 of the cylinder which is ready to exhaustreaches one endof the trough 40 the related tappet rod 45 is forced inwardly of thecam.

F and the exhaust valve 36 opened so that the gases can exhaust throughthe trough 40 to the atmosphere. As the cross arm 46 is held by the camF one end thereof passes under the iiange 54 which latter holds thetappet rod 45 in its inward position during the passage of the pipe 38through the limit of the trough 40. When the pipe 38 has passed beyondthe limit of the trough 40 the cross arm 46 moves out of engagement withthe flange 54 and the valve 36l is returned to its normal position bythe spring 37. The cam F is so timed that it operates to exhaust everyother cylinder during the rotation of the engine. Secured to the innerend of the bearing 4lO is a plate 59 and mounted on this plate and on adownwardly extending arm 60 rigid with the bearing 10 is a carbureter 61which de- `livers to the inner side of the plate 59.

Rigidly secured to the case 14 is a ring 62 the outer edge of whichbears against the plate 59. Mounted between the plate 59 and the case 14is a filler 63 which in conjunction with the ring 62 forms a fuel intakechamber 64, it being noted that the filler 63 is fixed to the plate 59.Radiating from the ring 62 is a plurality of pipes 65 which communicateat their outer ends with the inlet port 66 vof respective cylinders f C.Each inlet port is controlled by a valve 67 normally held closed by aspring 68, said valve opening inwardly and responding to the suction ofthe piston D duringr its suction stroke. The arrangement and position ofthe chamber 64 is such that the pipe 65 leading from the cylinder Cwherein the piston is partaking of its suction stroke, is

in communication with the chamber 64 and is therefore supplied with thedesired fuel from the carbureter` 61.

Rotatably mounted on the frame A isa 'shaft 69, having fixed thereon agear 7() which meshes with a gear 71 fixed on the trunnion 12 of thecase 14. This shaft 69 is provided with an operating handle 72 wherebythe shaft may be manually rotated to effect the starting of the engineas will be obvious. Fixed on the shaft 69 inwardly of the gear is a diskof insulating material 73v surrounded by a. metallic band 74 havingspaced projecting contacts 75, three such contacts being shown in thisinstance as five cylinders are employed in the engine. Rotatably mountedon the frame A and surrounding the inner end of the shaft 69 is a ringof insulating material 76.

which carries ay contactspring 80 to be en# gaged by the projecting'contact' 75 vastlie` 1T, meneer disk` 73 rotates. Also mounted 'on thering 76 is a binding post. 8 1 the inner end'of.

1.0- nected by a'wirev 85 with the spark plug 86 which carries a springcontact 82gvvhich' `constantly engages the,r lmetallic band'74.".-Mounted on the "frame'- A and insulated.v

therefromA isa contact plate-83 which is adapted to vbe engagedsuccessively by'contacts84 mounted on and insulated from the case 11,4,"Each of the contacts 84 is coni of the related cylinder C, The bindingpost 79 "is connected by a Wire 87 with a coil 88 and-the latter isconnected` `by a wire 89 with vthe" contact .plate 83 and by Wire 8.8Witha-battery 91. The binding post 8l is v connected by'a Wire 90 -withthe-batteryl andthe latterisconnected by a Wire 92 :und the vvire 88with the engine framefAI-to constitute the necessary ground. tation ofthe disk 7 3 and the band 74is 4so timed that.v an explosion in a given.cyl-

inder will only be eiected every othery time that its contact 84 engagesthe plate 83.

What is jclaimed'is 1.11; a rotaryengine, the combinationof a ,iixed.cranky a casin rotatably mounted 'von thercrank, a ,plurality ofcylmders rigidlyV located] on `the yperiphery 'of said cas-- ing,pistons in thecylinders connected with the crank, an exhaust valve foreach cylinder, an arm rigidly mounted on the crank,

a gear rotatably mounted on said arm; a

' gear rigid with the casing and meshing 40 a fixed crank, a casingrotatably*mounted with the gear on the arm, a `cam rigid with the gearon the arm, (and tappet rodsconnected with respective exhaust valv/es`.and ada ted to be operated'A to open saidvalves time cam duringrotation of the casing. 2. In a rotary engine, the'combination of on thecrank, aplurallty of cyllnders` rig.

.i idly located onthe peri hery of saidv oasder, a frame supporting saidcrank, anexing,pistons in the cylin ers connected with the crank, anexhaust val've for each cylin-` vhaust trough mounted on the frame,pipes@ l leading from the exhaust' yvalves lrespec-4 tively, an annular,band supported bythe tree' ends of said pipes. and through which .50' sthe 'pipes open, said band `closing the mouthof the exhausttrough,-. andmeans for` opening` the exhaust' valveA 4of alternatecylinders TheA ro-*1 through saidtransverse passages respecf tively and having their vendsenaged through respective pistons, said pipes eing provided With slotswhereby their bores are placed 1n communication with respectivelongitudinal passages, 'and means for supplyingy oilAto saidlongitudinal passages.

4. ln a rotary explosive engine the combination of a fixed crank, aplurality of cylindei's rotating about the crank, pistons in thecylinders, connecting. rods' pivoted at one end to the pistons,enlargements on the vother lends of the connecting rods, lateral Wingson each-enlargement extending under adjacent enlargements vqhereby thelatter'are held in spaced relation to the crank, andclam'ping bandssurrounding the enlargements.

5. In a rotary engine, the combination of a'xed crank,v a casingrotatable on the crank, a pluralit of cylinders rigidly lo lcated on theperiphery of said casing, pistons in the cylinders connected with thecrank, anormally closed exhaust valve for each cylinder, a tappet rodmounted on `the casing and connected with respective exhaust valves, acam device' mounted on the 'crank and rotated from thev casing to ac-4tuate the tappet, rods to open the exhaust valves, and a holding flangeon the crank adapted to engage and hold the tappet rods in v alveopening position after said rods have been-'operated to open thevalvesby the. cam` devices.

ln testimony whereo I ax my signature, in the presence o two witnesses;

\ ARTHUR JOHN Manx,

S. S. Srnmnn, Gnecn l CRoNnN.

